demo of driving MAX2719 dot matrix displays with STM32F103 Bluepill
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#ifndef MAIN_H
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#define MAIN_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include <stm32f10x.h>
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#define MIN(a,b) ((a)>(b)?(b):(a))
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#define MAX(a,b) ((a)<(b)?(b):(a))
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#define STR_HELPER(x) #x
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#define STR(x) STR_HELPER(x)
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// screen size
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#define SCREEN_W 16
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#define SCREEN_H 16
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#endif // MAIN_H
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